It worked! On a 80x80 canvas. I was working on a much larger canvas initially, working on a ttrpg map, and I was working on multiple sprites/tilemaps in one file, which is probably not a great habit.
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I'm glad you found a workaround! The canvas size shouldn't matter; it would just take longer to calculate.
However, you mentioned using tilemaps. In case you're using Aseprite's built-in Tilemap layers, that seems to be the cause of the crash. I have had this on my to-do list for my other plugin, but I haven't gotten around to looking into it yet.
I will put it as a disclaimer into the description :)